Some are due to lack of rest, and some are probably phenomena that science can't answer.
For example, a friend of mine, who has never been exposed to Buddhism, is always troubled by nightmares. She always dreams that someone is pursuing her. Later, after listening to the song Heart Sutra, she learned a few words. When she dreamed again, she dreamed that many strange things were chasing her. When she was particularly scared, she remembered several lines in the song and read them out in her dream. Then, the sky gave off a lot of golden light.
There are many such stories, so I won't continue to tell them. The meaning of this example is not to convey any superstitious ideas, but I hope you can understand that many things are not completely answered by science.
This friend asked for a bodhisattva in his dream and was saved. Very good. That woman is probably the incarnation of a bodhisattva.
Duke Zhou said it was good luck to dream of Buddha and Bodhisattva.
Buddhism also believes that dreaming of Buddha and Bodhisattva is a manifestation of eliminating karma, eliminating disasters and increasing the wisdom of blessing.
What exactly does that mean? We ordinary mortals should not explain it clearly, but what is certain is that you have a deep fate with Buddha and Bodhisattva. The landlord may wish to read more about the name of Guanyin Bodhisattva recently, or learn some Buddhism appropriately. I recommend you to look at the university lecture series of Soda-based Kampo, the apocalypse series of Xi Arongbo Kampo, Weibo of Dabao French King, and the apocalypse of Master Lv Hui and Master Xuanhua. These are all found on the internet, which is very convenient.